Thanks John for the cc info. and all your guidance.

So if I use the feeler gauge numbers it looks achievable...
.073 chamber depth
less .039 dome height
less .010 off the heads
add .020 head gasket
.043 total quench

With .010 off the heads, that will reduce CC's to approx 80-81. The piston is .034 in the hole which equates to approx 6.8 cc. Valve reliefs are at 1.8 cc based on KB236 spec. So with a total CC at approx 88.6, what would the SCR be...around 10.0:1?

I'll take your suggestion and polish the chambers the best I can shy of removing valves to accomplish any major ginding.

Not sure if it's worth anything, but while the heads were off, I selected 8 spark plugs that were indexed correctly.